Apparatus for turning irregular shapes



(No Model.) 2 Sheets-Sheet 1.

E. R. FELLOWS. APPARATUS FOR TURNING IRREGULAR SHAPES.

No. 499,977. Patented June 20, 1893.

WITNESSES: L I Pk/ENTER:

Tn: NDRRIS De inite; Puaraumov wAsnmsmu. n, c.

2 S W 0 L L B h R B APPARATUS FOR TURNING IRREGULAR SHAPES.

Patenfed June 20, 1893.

INVENTEIR! 63 llnlililW-IIIJ 'h w. WM .48.

r noams wzrzns cu. mom-L the planes of lines y,yand z, z, Fig. 2.

UNITED STATES PATENT ()FFICIE.

EDWIN R. FELLOWVS, OF SPRINGFIELD, VERMONT.

APPARATUS FOR TURNING IRREGULAR SHAPES.

SPECIFICATION forming part of Letters Patent No. 499,977, dated June 20, 1893.

Application filed .Tune 6, 1892. Serial No. 435,660. (No model.)

To aZZ whom it may concern.-

Be it known that I, EDWIN R; FELLOWS, of Springfield, in the county of Windsor and State of Vermont, have invented certain new and useful Improvements in Apparatus for Turning Irregular Shapes, of which the following is a specification.

This invention has for its object to provide mechanism for turning or boring metal in any desired form other than circular, and particularly for turning hexagonal and square forms.

The invention consists in the construction and combination of parts as hereinafter described and claimed.

Of the accompanying drawings, forming part of this specification: Figurel represents a plan View of a portion of a lathe spindle and turret provided with my improved mechanism. Fig. 2 represents an end view of that portion of the apparatus which is attached to the turret. Fig. 3 represents a side elevation of the portion of the apparatus shown in Fig. 2. Fig. 4: represents a top view of said portion. Fig. 5 represents a section taken on Fig. 6 represents a side view of the cam or pattern attached to the work-holding spindle. Fig. 7 represents a section on line 7,7, Fig. 4. Figs. 8 and 9 represent a modification.

The same letters of reference indicate the same parts in all the figures.

In the drawings: A represents a holder or body, which may be secured in any suitable way to the turret T, the connection being preferably effected by means of acylindrical shank A, formed on the holder A, and fitted in a socket formed for its reception in the turret. The turret is or may be of any suitable construction, and forms no part of my invention.

B represents a slide, which is fitted to move upon a dove-tail guide A on the holder A,'

and may be adjusted on said holder and held at any position to which it may be adjusted by means of an adjusting nut B journaled in a bearing on the slideB, and a screwthreaded rod B affixed to the holder A and engaged with the nut 13*.

0 represents a tool-holder, which is affixed to a rock-shaft O fitted to turn in asleeve or bearing B on the slide B.

To the tool-holder O is affixed a tool 0', which may be adj ustably secured to the toolholder by any suitable means, and may be formed to act in any desired manner upon the work to be shaped; that is to say, it may be adapted to form an external surface or an internal surface on the work. I have here shown the tool 0' as adapted to act on the exterior of the Work, and to form a series of flat sides, arranged in polygonal order, the work being suitably rotated while the tool is presented to it. The tool-holder C is adapted to oscillate in the bearing B, so that the tool mayhave an oscillating or reciprocating movement toward and from the axial line of the work W, said work being shown in Fig. 2 in dotted lines as a hexagonal nut or piece.

S represents the work-holding and rotating chuck or spindle, which may be of the usual or any suitable construction, and is arranged in the usual relation to the turret T. To the spindle is affixed a cam or pattern J, the configuration of which will depend upon theform which itis desired to impart to the work. The form of cam shown in Fig. 6 is adapted to actuate the tool through the intermediate mechanism hereinafter described, in such manner as to produce the hexagonal form of work shown in Fig. 2, the perimeter of the cam being composed of a series of salient and re-entrant curves.

The intermediate mechanism which I employ to communicate motion from therotating cam or pattern to the tool-holder, in the best embodiment of which I am now aware, comprises the following elements, namely, first, a trundle roll H, mounted to rotate loosely upon a shaft or arm H; secondly, an arm G, supporting the shaft H and affixed to a rock-shaft F which is journaled in a bearing B formed on the body A; thirdly, an arm F, affixed to the opposite end of the rock-shaft F from that to which the arm G is affixed, said arm F having a dovetail rib or guide F; fourthly, a slide or block E, fitted to slide upon the guide F, and provided with a stud E and, lastly, an arm D, affixed at one end to the rock-shaft C and pivotally connected at its other end with the stud E A helical spring U, shown in dotted lines in Fig. 2, bears at one end upon the bottom of a socket formed in the slide B, and at the other end upon a stud U on the tool-holder, said spring actingto move the rtool holder, away from the work W, and thus hold the trundle-roll H yieldingly against the periphcry of the cam or pattern J, through the described connections between said trundle-roll and tool-holder. It will abe seenytherefore, that the rotation of the cam or pattern J causes the trundle-roll and the arm 1G. to oscillate, and impart an oscillating motion to= the arm F, Which in turn imparts a similar motion throug'hthe block E and arm D tothe, rock-shaft -C tool-holder C and tool 0'. The? rotation of the cam or pattern I causes 'the'arm F to oscillate through an unvarying arc, theextent of its movement being, determinediby the.,config, ration ,ofthe eam. tllhe-eliding or selteadj ustingconnectionpbetween thelarms I and 'D-tsa dtc n ec i i i er 'shqwn asn he guide ,F' and I block yE) causes the :arm @Fill) co n -"municate an oscillati n g-motion tothe arm :a 1tQo d n 1that he'toolfl'fieg en l a reciprocatin g lmotion toward ,and I fil'Qi :the center ot-the work,:and is,thereforegcaused to impart to the rotating-work the polygonal (or; otherform fonwhichthecamorpattermwasdfi-l signed. The :saidslidingconnection enables the tool to be adjusted to produce .workof anydesiredsize without varyingthe predetier-l. mined form. When the parts areadjusted so5 that the, arm F aud its guide F' are parallel with the guide on which the;s1i,de B ,istmo v-i;

able, said slidennay be movefl sto auy desiredl extentto carry the {tool toward-or from thei axial y-line ,ofgthe Work, the block iE slidingonj the guide F'sothattheleverage of the arm F; on ithearm .D changes:exactlyras the distance b t-w en evp th t ingftoo -a dzthei centerofithmworkphanges. Hencethe-adjust-E ment of the tool towardorfromt lfl-axis of the work affects the .size "but notthe form of i thework. Thisprovisionfor the production of anydesired size of aigi ven;formiof-work,is one o m hmp rtan e Inall deyicesheretofore employed, ofiwhich" I am aware, for turning polygonal forms, the construction and arrangement has been such that, ,inadjustingthe apparatus-wont diflerent sizes, gtherewill inevitably be a variation oftheformr For example, if the apparatus ispadapted to iproperlyaform a rpiece of -;worlr two inches square,any-a justment for cntting a smaller size will produce work withconcave sides,;and any adjustment t increase the size will produce-work with convex sides. lll his objection rlentirelyohviate ;byproviding;an arm adapted to be oscillatedfin*amnnvarying arc ybythe cam,;a tool'holder adapted to-oscillate-or ,reciprocatetoward and ,f'romthe center of ,the -WQlfk, and intermediate connecting mechanism whereby any desired extent aQfj oscillating orreciprocating movement maybe imparted 'from the cam-operated arm in the tool-holder,saidmechanisminclndingtwogeneral parts, one of which, as hereshown isthe rock-shaft F arm F and its guide 3F; and

the sliding or self-adjusting connection, in

any desired manner, without departing from .thewspirit of lny invention,=solong as the desired result is attained, namely,the imparting of any desired length of reciprocating motion to atoohfronnan arm or part to which an unvaryiug reciprocating or oscillating niotion is given" by -acain or pattern.

I do not limit myself to the employment of the described improvements in connection with 1 t 'fltflfingicflmjl,and :a *nomrotatiug "holderyonbody A, as ifidesinednthezcamimay be held ;stationary ,and 1116 ibod-ylA rotated, thusYgivi-ng the ,tool-iholderaud tooharrevclvi-ng motion around-athetworknthe *latterbeing,

held stationary.

":Itisobvious-what ythezgtooleholderiand "the cnttingtoolimay reciprocate in a rectilinear instead of imaicurved path. flhiscairbe-accomplished bynnaking ethe 'tool holdemas a slide, adapted to move on a suitable guide on the slide J3, and substituting for iihfiyitlln D a bell-crankdever, one;arm of hieirwouldzhe connected with the block J3, ;and ut-he sother m to t e slidingatoohholder.

I domot-limitmyseltiinaallrcasesitothe ;use of ,thepadjusting slide,B,-i-'as,,in caseit is desiredito produce only one :size of workysaid slide may the: omitted.

, "'llhemoldenA -and the paltsrcarried atherebyzmay be supplied 1011.19 market .as 'an :at-

tachment for gturret machines w'ithoutrthe cam or pattern.

which immovable longitudinallydn a guide formed in the -arm;G,;andjisiconnectedaztosaid guide by meansofiaispline G wig. ),-whieh prevents the shaftflt'rqmmotating. ,Aispring Hi located in a-pavitydn theishaft :IrI and bearing at one endagainst -aloose-,piul-I normally presses the trundle --.-roll 11 outwardlyltoward the cam J, by treason {of the fact thatone end-of the loose pin I1 :bears againsha-suitablemupport, .-which rmaybelthe arm zF- flhe 'trnnd errol i ap ov ded with :a shoulder 1151 which lbears against oneflside of h amtA :the urre iadvancesitowardtthe r011 yields against the pressure of thezspring H H i arra gemen is adapted :f r :th

'sa eo convenience, hutit i :n t e se i as the same result may-beproducedby either vspindle ;S,;in :feeding the Work, the gtrundlemaking the trnndlew toll H long enough or the cam J wideenonghto coinpensateforzthe necessarygrnovementof the turret.

Myimproved mechanism isradapted -t0;impart to the work any form imwhichthaaugles are such 335 not -to :necessitate the -cutting awayiof too much ,metal itoward theend of the cutting tool. Practice proves that any angle up to ninety degrees (90) can be formed.

My invention is not limited to the employment of the described intermediate mechanism and sliding connection between the arm or lever which bears on the cam and the toolholder.

Then it is not desired to provide adjustable connection between said arm and the toolholder, the construction shown in Figs.8 and 9 may be used. In this modification, the arm G, rock-shaft F arm F, slide E and arm D are omitted, and the tool-holder is provided with an arm D, which supports the trundleroll H, said roll being held in engagement with the perimeter of the cam or pattern, so that the rotation of the latter oscillates the arm D and tool-holder 0, thus giving the tool 0 a back and forth motion, the result being the same as that of the construction previously described, excepting in so far as producing work of different sizes is concerned.

I claim 1. The combination of a cam or pattern,an arm or lever held in engagement therewith, a holder or body, a rock-shaft journaled in a bearing affixed to said holder, aslide movable on said holder, a tool-holder supported by said slide, and self-adjusting connections between said tool-holder and rock-shaft whereby a back and forth motion is imparted from the rock-shaft to the tool-holder under all adjustments of the latter, as set forth.

2. The combination of a cam or pattern, an arm or lever held in engagement therewith, a

- holder or body, a rock-shaft journaled in a in a bearing on said slide and provided with an arm having a sliding connection with said movement-transmitting arm, and a tool-- holder provided with a cutting tool afiixed to the last-mentioned rock-shaft, as fet forth.

3. A tool or attachment, comprising a holder or body adapted to be secured to a turret or feeding device, a rock-shaft journaled in said holder and provided with an arm adapted to receive motion from a cam or pattern and with a motion-transmittingarm, a slide movable on said holder, a tool-carrier on said slide, and a self-adj usting connection between the tool-carrier and the said motion-transmitting arm, as set forth.

4. Atool or attachment, comprisingaholder or body adapted to be secured to a turret or feeding device, a lever pivoted to Said holder, one end of said lever being adapted to receive motion from a cam or pattern the other end being a motion-transmitting arm, aslide movable on said holder, at tool-carrier on said slide, and a self-adj usting connection between the tool-carrier and the said motion-transmitting arm, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this 28th day of May, A. D. 1892.

EDWIN R. FELLO\VS.

Witnesses OTIS GRIDLEY, W. D. Woo LSON. 

